78 lines
2.4 KiB
C++
78 lines
2.4 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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// UNSUPPORTED: c++03, c++11, c++14, c++17
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// <string>
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// template <class charT, class traits, class Allocator, class Predicate>
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// typename basic_string<charT, traits, Allocator>::size_type
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// erase_if(basic_string<charT, traits, Allocator>& c, Predicate pred);
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#include <string>
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#include "test_macros.h"
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#include "test_allocator.h"
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#include "min_allocator.h"
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template <class S, class Pred>
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void test0(S s, Pred p, S expected, size_t expected_erased_count) {
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ASSERT_SAME_TYPE(typename S::size_type, decltype(std::erase_if(s, p)));
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assert(expected_erased_count == std::erase_if(s, p));
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LIBCPP_ASSERT(s.__invariants());
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assert(s == expected);
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}
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template <typename S>
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void test()
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{
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auto isA = [](auto ch) { return ch == 'a';};
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auto isB = [](auto ch) { return ch == 'b';};
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auto isC = [](auto ch) { return ch == 'c';};
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auto isD = [](auto ch) { return ch == 'd';};
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auto True = [](auto) { return true; };
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auto False = [](auto) { return false; };
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test0(S(""), isA, S(""), 0);
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test0(S("a"), isA, S(""), 1);
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test0(S("a"), isB, S("a"), 0);
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test0(S("ab"), isA, S("b"), 1);
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test0(S("ab"), isB, S("a"), 1);
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test0(S("ab"), isC, S("ab"), 0);
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test0(S("aa"), isA, S(""), 2);
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test0(S("aa"), isC, S("aa"), 0);
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test0(S("abc"), isA, S("bc"), 1);
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test0(S("abc"), isB, S("ac"), 1);
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test0(S("abc"), isC, S("ab"), 1);
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test0(S("abc"), isD, S("abc"), 0);
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test0(S("aab"), isA, S("b"), 2);
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test0(S("aab"), isB, S("aa"), 1);
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test0(S("aab"), isC, S("aab"), 0);
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test0(S("abb"), isA, S("bb"), 1);
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test0(S("abb"), isB, S("a"), 2);
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test0(S("abb"), isC, S("abb"), 0);
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test0(S("aaa"), isA, S(""), 3);
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test0(S("aaa"), isB, S("aaa"), 0);
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test0(S("aba"), False, S("aba"), 0);
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test0(S("aba"), True, S(""), 3);
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}
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int main(int, char**)
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{
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test<std::string>();
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test<std::basic_string<char, std::char_traits<char>, min_allocator<char>>> ();
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test<std::basic_string<char, std::char_traits<char>, test_allocator<char>>> ();
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return 0;
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}
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